Shaking machine with u-shaped countermass members



Sept. 6, 1966 R TEUTEBERG ETAL 3,270,883

SHAKING MACHINE WITH U-SHAPED COUNTERMASS MEMBER Filed April 5. 1963 /NVEN TOR R0001; Til/TIBERG pTra VE rs United States Patent 3,270,883 SHA'KING MACHINE WITH U-S'HAPED COUNTERMASS MEMBERS Rudolf Teuteberg, Werner Nickel, and Friedrich Breuneis, Dortmund, Germany, assignors to Schuchtermann & Kremer-Baum Aktiengesellschaft fiir Aufbereitung, Dortmund, Germany, a corporation of Germany Filed Apr. 3, 1963, Ser. No. 270,215 Claims priority, application Germany, Apr. 26, 1962, Sch 31,361 6 Claims. (Cl. 209-329) This invention relates to shaking machines, for example, resonance screens or other such shaking machines, which are designed as two-body systems. On the one hand, there is the material handling member, such as a screen box and which is resiliently supported as by isolating springs, and on the other hand, there is a countermass which is resiliently connected as by means of springs with the material handling member, and interposed between the material handling member and the countermass, is an energy storage spring means. Such shaking machines are known.

The invention provides a new arrangement of the countermass. According to the invention, the countermass is U-shaped and can straddle the material handling member with its legs in such a manner that the legs extend in the direction of vibration. The energy storage springs can be disposed in recesses in the limbs and the vibratory drive can be mounted on the crossmember of the U- shaped counter-mass straddling the screen box.

This design and arrangement of the countermass makes it possible to build low, light shaking machines, and, since the countermass is very rigid due to its U-shape, also to utilize a light countermass so that, especially in the case of ratios of working body weight to countermass of more than 1, especially low machine weights can be realized.

Thus, the invention provides a shaking machine comprising a spring mounted handling member, a countermass member resiliently mounted on the material handling member, a storage spring operatively interposed between the countermass and the spring mounted material handling member, and means for imparting vibrating motion to one of said members for transmission of vibrating motion to the other of said members through said storage spring. By this arrangement, said members vibrate 180 out of phase with respect to each other. The shaking machine of the invention is characterized in that the countermass member is U-shaped and is disposed with one leg thereof on either side of the material handling member with the crossarm thereof extending across the material handling member. The legs are disposed in parallel relation and substantially in the direction of vibration.

In a preferred construction according to the invention, recesses are provided in the legs and storage spring elements are disposed in the recesses. A crossarm is rigidly secured to the material handling member and end portions thereof extend into the said recesses. The storage spring elements are operatively disposed between the material handling member crossarm end portions and the countermass in the recesses.

The means for imparting vibrating motion to the system can be an imbalance drive for imparting rectilinear vibration to the material handling member and the countermass. Desirably, the means for imparting vibration is an oscillatory drive working on the crossarm which is rigidly secured to the material handling member.

The invention is further described in the accompanying drawing, wherein:

FIG. 1 is a schematic view, in elevation, of apparatus according to the invention;

3,270,883 Patented Sept. 6, 1966 FIG. 2 is a plan view of the apparatus shown in FIG. 1; and

FIG. 3 is a View taken along line 33 in FIG. 1.

In the various figures of the drawing, like reference characters indicate corresponding parts.

The shaking machine shown in the drawing is a resonance shaking screen and comprises the screen box 1 which represents the material handling member of the vibrating system, and the countermass 2. The screen box 1 is supported resiliently upon support springs 3 and bears the screen mesh 4. The countermass 2 has a U- shape, straddles the screen box with its legs 5, and is linked by means of springs 6 to the screen box 1 in such a manner that it is disposed with its legs in the direction of vibration. Between the screen box and the countermass are disposed the energy storage springs 7, which store and release the vibratory energy of the vibrating bodies 1 and 2 in synchronisrn with the rate of vibration. Bodies 1 and 2 and the energy storage springs form together a two-body vibrating system in which, as it is known, the bodies oscillate out of phase with one another.

The energy storage springs 7 are fastened to the ends of a crossarm 8 which is rigidly affixed to the screen box 1 by supports 20, and extend into recesses 9 in the legs 5 where they stand opposite and clear of the bumper plates 10 affixed to the countermass legs. If desired, the energy storage springs 7 can be fastened in the recesses 9 and the bumper plates 10 on the crossarm 8. Screen crossarm 8 and countermass crossarm 12 are preferably arranged above the side members la and 1b of the screen box 1, in order to obtain the highest possible clearance for the material being screened.

The arrangement of the countermass 2 on the screen 'box 1 is such that the straighting line which connects the centers of gravity S and S of the screen box and countermass, respectively, and on which the combined center of gravity S lies, extends parallel to the direction of vibration of the system.

The drive 11, a crank in the present case, is disposed on the crossmember 12 of the U-shaped countermass straddling the screen box 1, and is direct connected to the screen crossarm 8 with its elastic push rod 14, which can be a spring, and passes through an opening 13. Thus, the drive is loosely coupled to the crossbeam 8 connected to the screen box. The crank drive 11 includes a shaft 21 which is rotatably received in the sliding bearings 22, and is mounted for rotation with the drive wheel 23, which in turn, is connected by belt 24 with the motor drive 25. Instead of the crank drive 11, 14, an eccentric weight drive can be used, preferably one providing rectilinear vibration.

The invention is similarly applicable to resonance vibrating machines such as feed shoes under bunkers or as vibrating conveyors.

While the invention has been described with reference to particular embodiments thereof, these embodiments are merely representative and do not set forth the limits of the invention.

What is claimed is:

1. A shaking machine omprising a spring mounted material handling member and a countermass member resiliently mounted on the material handling member, said material handling member including side members and a screen mounted within said side members, the countermass member being U-shaped disposed with one leg thereof on either side of the material handling member, and having a cross member extending across the material handling member, said side members terminating below said cross member, the legs of said U-shaped member being disposed in parallel relation and substantially in the direction of vibration, each of said legs having means defining a recess therein, a crossarm rigidly connected with said material handling member, the end portions of said crossar-m projecting into the said recesses, storage springs disposed in said recesses and operatively interposed between said crossarm and said U-shaped countermass for transfer of vibration between the U- shaped countermass member and the crossarm of the material handling member, and means for imparting vibration to said material handling member and countermass.

2. A shaking machine according to claim 1, and including an oscillatory drive for imparting vibration to the shaking machine operatively connected to said crossarm.

3. A shaking machine according to claim 1, said countermass cross member and said material handling member crossarm being disposed above the material handling member.

4. Apparatus according to claim 1, and comprising an imbalance drive for imparting rectilinear vibration to the shaking machine and directly connected to said crossarm.

References Cited by the Examiner UNITED STATES PATENTS 3,035,699 5/ 1962 Bruderlein 209-365 FOREIGN PATENTS 823,152 11/1937 France. 1,234,982 5/1960 France.

666,453 10/ 1938 Germany.

HARRY B. THORNTON, Primary Examiner.

HERBERT L. MARTIN, Examiner.

R. HALPER, Assistant Examiner. 

1. A SHAKING MACHINE COMPRISING A SPRING MOUNTED MATERIAL HANDLING MEMBER AND A COUNTERMASS MEMBER RESILIENTLY MOUNTED ON THE MATERIAL HANDLING MEMBER, SAID MATERIAL HANDLING MEMBER INCLUDING SIDE MEMBERS AND A SCREEN MOUNTED WITHIN SAID SIDE MEMBERS, THE COUNTERMASS MEMBER BEING U-SHAPED DISPOSED WITH ONE LEG THEREOF ON EITHER SIDE OF THE MATERIAL HANDLING MEMBER, AND HAVING A CROSS MEMBER EXTENDING ACROSS THE MATERIAL HANDLING MEMBER, SAID SIDE MEMBERS TERMINATING BELOW SAID CROSS MEMBER, THE LEGS OF SAID U-SHAPED MEMBER BEING DISPOSED IN PARALLEL RELATION AND SUBSTANTIALLY IN THE DIRECTION OF VIBRATION, EACH OF SAID LEGS HAVING MEANS DEFINING A RECESS THEREIN, A CROSSARM RIGIDLY CONNECTED WITH SAID MATERIAL HANDLING MEMBER, THE END PORTIONS OF SAID CROSSARM PROJECTING INTO THE SAID RECESSES, STORAGE SPRINGS DISPOSED IN SAID RECESSES AND OPERATIVELY INTERPOSED BETWEEN SAID CROSSARM AND SAID U-SHAPED COUNTERMASS FOR TRANSFER OF VIBRATION BETWEEN THE USHAPED COUNTERMASS MEMBER AND THE CROSSARM OF THE MATERIAL HANDLING MEMBER, AND MEANS FOR IMPARTING VIBRATION TO SAID MATERIAL HANDLING MEMBER AND COUNTERMASS. 